Funny, I've advised low budget projects of exactly the opposite; Anamorphic glass costs more to rent than some very good spherical options AND it demands a more experienced 1st AC to land focus properly on Anamorphic glass, post is a little more complicated (not for those of us sitting here on a Saturday night discussing the ins and outs of exact pixel ratios, but for the likes of people that tend to be working on the lower budget projects) and thus costly, and even monitoring the image on set can involve some additional hardware, software, and even people, all things considered. I've worked on . . . 9 features now, in dailies or on set, and only 2 of those shot Anamorphic. One was a Tier 1, and the only reason it was able to shoot Anamorphic is because some of the people involved were long-time veterans of the industry and were able to call in a TON of favors. If my opinion is asked, I would never suggest a low budget project shoot anamorphic, despite the valid advantages you mention.